CBC news is reporting that the city of Eastport, Maine is applying for federal funding to rebuild a railway line from Eastport to the Canadian border at Calais.
The Maine Central Railway abandoned the Eastport branch line in 1978. I understand the state railbanked a portion of the old Calais branch, but the portion from Ayers Junction to Eastport was totally removed.
There is an engineering study posted on the Eastport Port Authority web site. Zipping to the bottom line, we find the costs estimated to be between $26 million and $44 million, depending on what level of track is deemed to be required.
All I can say is "good luck".